import { UserConfig, defineConfig } from "vite";
import { svelte } from "@sveltejs/vite-plugin-svelte";
import copy from "@guanghechen/rollup-plugin-copy";
import manifest from "./manifest.json";
import path from "path";
import builtins from "builtin-modules";

import dotenv from "dotenv";
import dotenvExpand from "dotenv-expand";
const env = dotenv.config();
dotenvExpand.expand(env);

export default defineConfig(async ({ mode }) => {
	const { resolve } = path;
	const prod = mode === "production";

	let outDir = "dist";
	if (!prod) {
		if (!process.env.OBSIDIAN_PLUGIN_DIR) {
			console.log(
				"Set OBSIDIAN_PLUGIN_DIR in the .env file to plugin directory to copy files to."
			);
		} else {
			outDir =
				process.env.OBSIDIAN_PLUGIN_DIR + "/" + manifest.id + "-dev";
		}
	}

	if (outDir[0] === "~") {
		outDir = path.join(process.env.HOME!, outDir.slice(1));
	}

	return {
		plugins: [
			svelte(),
			copy({
				targets: [{ src: "manifest.json", dest: outDir }],
			}),
		],
		resolve: {
			alias: {
				"@components": resolve(__dirname, "./src/components"),
				"@data-sources": resolve(__dirname, "./src/data-sources"),
				"@settings": resolve(__dirname, "./src/settings"),
				"@utils": resolve(__dirname, "./src/utils"),
				"@views": resolve(__dirname, "./src/views"),
				"@src": resolve(__dirname, "./src"),
			},
		},
		build: {
			lib: {
				entry: resolve(__dirname, "src/main.ts"),
				name: "main",
				fileName: () => "main.js",
				formats: ["cjs"],
			},
			minify: prod,
			sourcemap: prod ? false : "inline",
			cssCodeSplit: false,
			emptyOutDir: false,
			outDir,
			rollupOptions: {
				input: {
					main: resolve(__dirname, "src/main.ts"),
				},
				output: {
					entryFileNames: "main.js",
					assetFileNames: "styles.css",
				},
				external: [
					"obsidian",
					"electron",
					"@codemirror/autocomplete",
					"@codemirror/collab",
					"@codemirror/commands",
					"@codemirror/language",
					"@codemirror/lint",
					"@codemirror/search",
					"@codemirror/state",
					"@codemirror/view",
					"@lezer/common",
					"@lezer/highlight",
					"@lezer/lr",
					...builtins,
				],
			},
		},
	} as UserConfig;
});